Build tool to selectively run blocks of build commands under specified conditions
HitchTrigger is a self contained build tool designed to trigger blocks of build commands when a condition is met that necessitates a rebuild.
The conditions can be one or more combined of any of the following:
- A file or files (e.g. source files) have changed.
- A specified (build) directory did not exist.
- A period of time has elapsed.
- A ‘watched’ variable has changed its value.
- An exception occurred the previous time the commands were run (always by default).
To install from pypi:
$ hitch install hitchtrigger
import hitchtrigger monitor = hitchtrigger.Monitor( "/path/to/project.watch" #override=["virtualenv", ], ) # Will run in the following cases: # ## The command block has never been run before. ## An exception was triggered within the context manager on the previous run. ## venv directory is non-existent. ## A period of 7 days has elapsed ## A previous block named 'previousblock' was run. ## Either requirements.txt or dev_requirements.txt have been modified (file modification dates are monitored). ## Var "v=1" is changed (e.g. to "v=2"). ## The line 'override=["virtualenv", ]' is uncommented. with monitor.block( "virtualenv", monitor.nonexistent("venv") | monitor.not_run_since(days=7) | monitor.was_run("previousblock") monitor.modified(["requirements.txt", "dev_requirements.txt"]) | monitor.var(v=1) ).context() as trigger: if trigger: print(trigger.why) # Prints out reason for running Path("venv").rmtree(ignore_errors=True) virtualenv("venv").run() pip("install", "-r", "requirements.txt").run() pip("freeze").stdout(Path("freeze.txt")).run() pip("install", "dev_requirements.txt").run()
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